Account performance feature

Hi Mike - I built an account performance feature for Stock-Tracker.  It shows a list of the stocks the user owns (open price, last price and % changed are shown).  Underneath the table, the user's account value at the initial price of the stocks and their account value at the last price of the stocks is shown.  I wrote code to compute the % changed value because the % changed value returned by Yahoo! is based on the lowest price of the day, not the open price.

The code compiles and runs on my system.  Please let me know what you think!